How long do dubbed episodes take to be aired after their sub counterparts?

On average (in days), how long do American dubs take to be aired on television/released online after the Japanese subs?Also, what was the largest time gap between a sub and its respective dub and what was the smallest?Really curious to know.

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Largest time gap- Episode 18 (Beauty and the Beach) - 1061 daysSmallest time gap- Episode 43 (The March of the Exeggutor Squad) - 176 days

Largest time gap- Episode 207 (The Kecleon Caper), 208 (The Joy of Water Pokémon), 209 (Got Miltank?), 210(Fight for the Light!) - 408 daysSmallest time gap- Episode 247 (Will the Real Oak Please Stand Up?) - 155 days

Largest time gap- Episode 390 (Date Expectations) - 415 daysSmallest time gap- Episode 278 (A Ruin with a View) - 107 days

Largest time gap- Episode 422 (Fear Factor Phony) - 337 daysSmallest time gap- Episode 459 (Aipom and Circumstance!) - 161 days

Largest time gap- Episode 472 (Dawn Of A New Era!) - 245 daysSmallest time gap- Episode 520 (Smells Like Team Spirit!) - 99 days

Largest time gap- Episode 708 (Enter Elesa, Electrifying Gym Leader!), 709 (Dazzling the Nimbasa Gym!), 710 (Lost at the Stamp Rally!), 711 (Ash Versus the Champion!) - 100 days

Smallest time gap- Episode 928 (Analysis Versus Passion!), 929 (A Riveting Rivalry!), 930 (Kalos League Passion with a Certain Flare!), 931 (Finals Not for the Faint-Hearted!), 932 (Down to the Fiery Finish!), 933 (A Towering Takeover!), 934 (Coming Apart at the Dreams!) - 79 days

Largest time gap- Episode 942 (Alola to New Adventure!), 943 (The Guardian’s Challenge!) - 18 daysSmallest time gap- Episode 945 (First Catch in Alola, Ketchum-Style!) - 171 days

Note:- The episode number is the cumulative of all episodes aired injapan